Guard for dental instruments.



J. NEIL, JR.

GUARD FOR DENTAL INSTRUMENTS.

APPLICATION FILED MAR. 15, 1911.

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TE I BI JAMES NEIL, JR], or NEW YORK, n. Y.

GUARD FQB DEhT'lAL INSTRUMENTS.

Specification. of Letters Patent. Patented Mar. 28, 1912,

Application filed March 5, 1911. Serial no. 614,737.

To all whom it may-concern:

Be it known that LJAMEs NEIL, Jr., a citizen of the United States, residing at New I ,York, in the county of New York and State of New York, have invented a new and useful Guard for Dental Instruments; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use-the same.

'This invention relates to a new and useful stone guard or shield for dental grinding tools. a

. The invention in its broadest scope aims to provide as its primary object an-improved guard of this design, for protecting the tongue and the surroundmg" tissues of onels mouth against injury.-

A further ob ect of the invention isto providethe guard with a recess or depression for the reception'of a wad of moist cotton or the. like for obviating the possibility of the grinding 'stone becoming hot, and also to improve the cutting and grinding of the stone.

The invention comprises further features and combination of parts, as hereinafter set forth,-sho wn in the drawings, and claimed;

In the drawings :'Figure 1 is a view' in elevation of a dental grinding tool, showing the application of the improved guard applied thereto, and constructed in accordance with the invention. Fig. 2 is a sectional'view through a portion of the' guard, showing the grinding tool in elevation, and also illustratingthe recess or the cavityfor the reception'of a moist'w'ad of cotton. Fig. 3 is a "detail view of the guard detached from, the

grinding tool;

Referring to the drawing, 1 designatesthehand piece of the dental engine, while 2 denotes the guard shank. The guard shank.

is tubular in out-line,.and one end thereof is provided with oppositely arranged L-shaped slots 3, to engage the pinsjt of the-hand piece or'ma'ndrel, thusconstituting a form of slot and bayonet connection between the guard shank and the hand piece or mandrel, so asto hold the guard shank securely in place.

The diskof the guard is provided with a recess or concavity 10, for the purpose of The shank, however, terminates into the By this cutaway portion the piece subsequently toiconnecting the guard.

receiving a wad of moist cotton or the like,

11. By virtue ofthe cotton the grinding stone-or tool is kept moist, thus preventing to a great extent the stone becoming too hot.

-. The recess 10 is provided with an outward opening 7*, as' clearly shown in Figs. 2, 3

and 4 of the drawings. This opening 7 is 'for'the purpose of permitting the moist cotton to be inserted in the. recess 10 without removing the grinding stone or tool.

I From theforegoing, it will be evident that .there has been provided a novel form of dental guard'for grinding tools or tone's,

and one which has been found-to be simple in construction and efiicient practice.

Furthermore, it willbe observed that this guard-not only provides the above features but also includes novel means for moistening the grinding tool or" stone.

' The invention having been set forth, what is claimed as new and useful is:

'1. In combination, a grinding stone, a guard therefor comprising a disk like member having a circumferential annular flange and provided with a segmental'cntaway por-v 'tion, the disk like member having a recess provided with overhanging walls, adapted to contain a wad of moist fiber for moistening the grinding stone, thus preventing the same from becoming too hot, the overhanging walls constituting means to prevent accidental displacement of the moist wad of fiber.

2. In combination with a hand piece ofa dental engine, a stone guard detachably con- In testimony whereof I have signed my nected thereto and provided with a recess name to this specification in the presence of having overhanging walls adapted to cont-wo subscribing witnesses. 1

tain a.-wad of moist fiber'to keep :the stone JAMES NEIL. JR. 5 moist so as to preirent the same becoming Witnesses: Y o.

too hot said recess being provided with an ALEXANDER J. FoR'rUNA'rI;

aperture. VINCENT FOR'JUNATI- 

